Bo Berglund wrote:
On Thu, 07 Oct 2010 02:14:47 +0000, Mark Morgan Lloyd
<[email protected]> wrote:
If I now close the port with my button and then try to open it again
there is an exception that forces the program to end.
Check port ownership, the groups the current user is in, and look at
dmesg output.
Hmm, what do you mean by that? Could you be more specific?
The current user is myself, there is no other account created on the
system and I am an admin.
And what is "dmesg output"?
I am not going into details because you're using Ubuntu hence Gnome
while I'm using Debian with KDE. Ubuntu is a derivative of Debian but
there are differences, and if I tried to give you detailed advice it
could backfire.
The device /dev/ttyS0 has an associated user and group, e.g.
$ ls -l /dev/ttyS0
crw-rw---- 1 root dialout 4, 64 2010-10-04 09:08 /dev/ttyS0
That shows that in order to do anything useful with the port the program
needs to either be run as root (considered bad practice), or the current
user needs to be in the 'dialout' group.
As for the other question,
$ dmesg |tail
followed I suggest by looking at the manpages for dmesg and less. Once
you've done that continue with e.g.
$ dmesg |less
--
Mark Morgan Lloyd
markMLl .AT. telemetry.co .DOT. uk
[Opinions above are the author's, not those of his employers or colleagues]
--
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